Sewing machine shuttle



April 25, 1933.

F. ASHWORTH SEWING MACHINE SHUTTLE Original Filed 'Feb. 9, 1929 Patented Apr. 25, 1 933 FRED .ASHWORTH, on BEVERLY, MASSACHUSETTS, AssIeNoR' ro UNITED sets 1 MACHINERY-CORPORATION, OFJPATERSON, NEW JERSEY, A CORPORATION '01? NEW JERSEY g snwine' MACHINE smrr'rnn Original application filed February ieza-seri i No. 338,756.; inv'mea' end this application filed ew,

1930. eener. No. 445,909.

The present invention relatesto sewing;

' the shuttle driver.

machine shuttlesand has'for its object providing a construction and arra'ngenient of parts intended to facilitate thehinsertionfof the shuttle thread into the shuttle "andfthe threading of the shuttle ready torl nse. Certain features ofQthe invention e exalso intended to facilitate the useof a"; thread cop instead of a bobbin and permit the 0 thread {to be drawnfrom the ce terfof e b p [end of which is open to permltthe incop if such a mode of operation is desired.

In embodying these featuresof the invene tion in the illustrated shuttle, an improved removable thread holder-or thread case 'for: the shuttle has been provided, wh ch; can

be completely threaded before being, placed in the shuttle andwhich, when placed in the shuttle, will exert the requisite amount, of tension on the; shuttle thread. {The 2o thread case andfshuttle alsogar e" provided with simple andeflicient means which will securely lock the thread case in the shuttle and which can be readily actuated togunlock the threadcaseqand permit'its removal.

dug-drawing, embodying the featuresof the ."lltt "1-... V present mventlon 15 t at 1 us m ed ap ing, the'shuttle threadlleading from the interior of the thread cop between theflehd oi tle casing where it is subjected to sufficient pressure to produce the required tension on thethread,:and then passing throughthe plicants pending applicationior .shoe sewing machines, filed February 9,1929, Serial No. 338,756, of whichthepresentapplica--' tion is a division. i

Referring to the drawing accompanying this application, Fig. 1 is a front fview of the shuttle illustrating somewhatdia'grammatically its position with relationto the needle and the Work; Fig. 2 is a detail front view of the thread holder casing removed from the shuttle; Fig. 3 is adetail sectional plan view of the shuttle and thread holder casing, a portion of the thread holder Teas lng being shown in section on the line- 3 in Fig. 2; Fig. 4 is a-sectional plan'view of the shuttle and thread; holder casinglillus trating the position of the shuttlewithrela- The shuttle illustratedinthe. accompanytion to the shnttle supporting racewayand The shuttle illustrated in the accompanying drawing, embodying the features of the "present invention consists of a discoidal shuttle casing 6, the rear end-0f which is closed and the forward end of which j is open to receive a thread holder. The thread holder, as illustrated, consists of g a cylindrical thread casing "8, the rear.

in position in the shuttle,- forms a closure for the open end of the shuttle casing.

From theclosed end of the thread holder casing aholl0wstud 10 projects inwardly so as toform a'central support for the inf serted thread copl] 'Within this hollow stud a'hollow plunger- T 12 is arranged vwhich is acted upon by a coiled spring 14, tending to forcethe plunger; against the rear wall of fthes'huttlecasing. V The hollow 'studlO and hollow plunger 12 form a central thread the forward end of thethread holder cas the plunger 12 and the rear wall of the'shutw thread passage'formed by the hollow plunger and stud to the outside of the thread'case, The cop of thread is placed in the thread case while the case isremovedfrom the shuttle, and it will be apparent that the thread case can be threaded before being placed in the shuttle and that after'the thread case is;

in position, while permittinglits ready re-I moval, locking devices are provided for ins."

, i i l passage for the shuttlethread openingon thread easing. vAs illustrated, the inter-engaginglockingdevices atone side of the casing comprisea flange 16 projecting radial;-

1 from the inner end of the thread casing,

'7 "and a. slot formed in theadjacent wall of the shuttle casing to receive the flange.

)- :coo perating slot,

' The other inter-engaging locking devices 7 "Way extending diametrically across the c'omprisega slide 18 mounted fin a guideouter face of the closed end of the thread ease and-agroo ve 20 formed in theinnen wan of the-shuttle casing.toreceive'the: end; of the, slide, With this construction," when the slide 18 is-in engagement with thegroove'fll' 2 0, as illustrated in Fig.4,the'thread case a is held-securely inpositionjwhile tof 'pern i 26 the ready removalrof the thread-case; it5=isfwardly and'then tip the thread casefslight lyrso as-.;to disengage the flange 16 from its: In order to hold the lockl ;i ng.slide 1'8 in'loeking position, a plunger L525; 22515 mounted in thefhollowstud an d: is

provided with an outwardlyflextending' end 7 '}'locking device, for "the locking slide,

merelyaneeessary to move the slide '18 inj .arranged to engageafhole 24Iformed-at the (proper. point in i the slidef18. This plunger is acted uponf-by the coiled spring 14: which factuatesthejplung'er 12 and is hollowed in order to form'a continuation of the passage for the shuttle thread. The slide 18 may be 1 conveniently unlocked by inserting a suitmove ,into'ninlocking position; A sidewise extensio 26 of the hol'e24 permits proper 1 threading of the thread case while the thread Fcase, is vremoved from the shuttlei casing and while the lookingslide is in unlocking po- The forward endpof the thread;

ably shaped tool in the hole 24,thereby forcing the 1plunger 22 downwardly so as to disen age t e slide 18 andallowfit'toibe holder [casing is providediwithiradialpex- Qop eratelwith inwardly proj eotifng shoulders formed in the shuttle casing toproventrd' ensionszas nd i a ic lli' "Oppo i to each other, forming "shoulders: which'fco- Enga es indicated; and a shuttle embody ing the'several featuresof theinvention havingfl been specifically described what is tation of the thread holder-casing relatively Y to thefshuttle easing. 1 v 7 .f

Th nitureand scope of the-invention hav claimed is :l I

twfeen' ,whicli' and the; inner 7 surface of the shuttle V comprisinga discoidalshuttle casing 4 hav-' ingan' open I end; a removablethread-holder [comprisingra cylindrioalc-casing having :an *endxforming anclosure'for, the open'endof the shuttle ceasing, said thread holder casv V ttle for shoe sewing machines comprising a discoidal shuttle casing having an open end, and a removable thread holder forminga closure forthe open end A,

of the shuttle casing provided with a. com a tral {hollow thread" supporting stud project- "ing inwardly "into the shuttle casing and I forminga threadipassage extending through n the stud and f opening the thread holder;

" 2.1"A shuttle 'forshoeon the outerside of "'slideis'inlockingposition.Q

sewing machines w GJ-A shuttIe for shoe sew ng machines forming a closure for the open end of the shuttle casing provided with a central holm shuttle casing and forming a thread passage '7 low/stud projecting-inwardly into the a ing an open end, a removable thread holder openingon the outer side of the thread holder, and a hollow spring pressed thread engagingplunger mounted in the stud be-Q 7 shuttle oasingthe shuttle thread passes.

3. A shuttle for shoe: sewing cmachines rcomprisingiadiscoidal shuttle-casing having .an open'end,'-aremovablegthread'holdereconn prising a cylindrical casing having anend formingyaclosure for the open end of the shuttleca'sing, means for removably lockt ing-the thread holder' to' the shuttl'e' casing comprising cooperating inter-engaging devices on the thread holder "and shuttle .cas- I Tings; a locking slide mounted injthe .end of the thread holder casing and; arranged to move diametrically across thejend ofthe 5 opposite said inter-engaging devices and a.

A tt 0 l-s 'i ew m chin "comprising a discoid'al shuttle casing having a1 1.open end, a removable thread holder-com prising acylindric'al casing having an i end prising cooperating inter-engaging devices 1 thread holder casing tofenga'gea groove I '7 "formed in ul shuttle casing diametrically o devices; and'a spring flpressed plunger are ranged to engageahole'in'the slide when the for shoe sewing machines, l

stud pro eet1ng lnwardly into the a shuttle i comprising ,cooperating interkengaging' de- 'ces at one sidelo'f the thread holdercas- :casinggirom the lend of, the thread holder v -cas'ing, means ior' removalo ly lockingthe thread holder casingfto the shuttlejcasing mg, a lockingslide mounted in the end of the thread holder casing and arranged to 'en-c gage to groove formed in the shuttle casdiametrically opposite said inter-engaging "devices, and fa hollow" 'spring. .press'ed plunger mounted said hollow studi ar ranged to engage a hole in the slide when the 100 'atfoneiside of the thread holder casing and a "locking slide mounted in the end of the thread holder easing and arrangedto engage agroove formed in the shuttle casing diam ric l y o te: d inter-engaging comprising a discoidal sh little casing having an open end, a removable thread holder comprising a cylindrical casing having an end forming a closure for the open end of the shuttle casing, means for removably locking the thread holder casing to the shuttle casing, and means for preventing rotation of the thread holder casing with relation to the shuttle casing comprising projecting shoulders on the outer periphery of the thread holder casing and cooperating in- Warclly projecting shoulderson the shuttle casing.

In testimony whereof I have signed my name to this specification.

FRED ASHWORTH. 

